From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: flummoxed why I can't umount my md device. fuser and lsof show no files locked Date: Tue, 21 Jun 2011 00:03:17 +0600 Message-ID: <20110621000317.156d7d27@natsu> References: <4DFF87F8.8050202@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/7xoo/_r=Mj+3mT8hXfgvlW."; protocol="application/pgp-signature" Return-path: In-Reply-To: <4DFF87F8.8050202@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: simonmcnair@gmail.com Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/7xoo/_r=Mj+3mT8hXfgvlW. Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 20 Jun 2011 18:48:40 +0100 Simon McNair wrote: > I wanted to run 'mkfs.ext4 -n /dev/md0' to see what settings it would=20 > choose that were different to mine but it keeps saying: > "/dev/md0 is apparently in use by the system; will not make a filesystem= =20 > here!". >=20 > I also can't stop the array using 'mdadm --stop /dev/md0' as it says=20 > mdadm: failed to stop array /dev/md0: Device or resource busy. pretty=20 > much the same error occurs when trying lvchange -an /media/local/Raid >=20 > I've no problem with any of this except I can't find out what process=20 > has a handle on the mount and/or why. so I can't stop/kill it. >=20 > I tried lsof | grep /media/local/Raid and fuser -m /media/local/Raid to=20 > no avail. I also tried ps aux | grep Raid. I've stopped pretty much=20 > everything in init.d including samba,nfs,mediatomb,squeezebox and=20 > anything I can think of that I've installed. >=20 > Any advice/ideas please ? I don't see you mention actually running "umount /media/local/Raid" (and perhaps listing the error messages you get after that). Perhaps it goes without saying and you did this, but in case not, remember that "mdadm --st= op" will not try to auto-unmount the filesystem for you first. Other ideas, AFAIK lsof and fuser won't show you a process that holds the filesystem mounted in case it doesn't have any files open there, but instead just has its *current directory* on the FS. So if you launched something wh= ile cd'ed somewhere in /media/local/Raid, and it's still running (maybe the superuser shell you currently work in?), that'd be your reason. -=20 With respect, Roman --Sig_/7xoo/_r=Mj+3mT8hXfgvlW. Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAk3/i2UACgkQTLKSvz+PZwjZ/QCffQK7HOKfnFWHqUqjaGd1hze0 PSgAni5WVrT9pYOsRkKU3cYsceYd9TaK =/WSO -----END PGP SIGNATURE----- --Sig_/7xoo/_r=Mj+3mT8hXfgvlW.--